Additional file 5: Figure S2.

Assessment of overlap between biological process gene-sets utilized by the Database
for Annotation, Visualization and Integrated Discovery (DAVID) pathway analysis tool
for unregulated genes in each of the four synovial clusters defined in Figure 1A. The overlap of genes shared by gene sets are illustrated using a heatmap where
each value represents the proportion of genes from the category on the y-axis that
are in common with the corresponding gene set on the x axis (indicated by the color
bar; 0 = 0%, 1 = 100%). The matrix is not symmetrical because the size of the gene
sets is not constant.